Journal of Zhejiang University SCIENCE
(ISSN 1009-3095, Monthly)

2005   Vol. 6B   No. 6   p.451-453

Differentiation of xanthomonads causing the bacterial leaf spot of poinsettia in China from the pathotype strain of Xanthomonas axonopodis pv. poinsettiicola

LI Bin¹, XIE Guan-lin^†1, SWINGS J.²

(¹Institute of Biotechnology, Zhejiang University, Hangzhou 310029, China)
(²Laboratorium voor Microbiologie, Universiteit Gent, K. Ledeganckstraat 35, 9000, Gent, Belgium)
^†E-mail: glxie@zju.edu.cn
Received Jan. 18, 2005; revision accepted Apr. 1, 2005

Abstract: In October 2003, a new bacterial disease with symptoms similar to those caused by Xanthomonas axonopodis pv. poinsettiicola was observed on poinsettia leaves at a flower nursery in Zhejiang Province of China. Three Xanthomonas strains were isolated from infected plants and classified as X. axonopodis. They were differentiated from the pathotype strain LMG849 of X. axonopodis pv. poinsettiicola causing bacterial leaf spot of poinsettia by comparison of pathogenicity, substrate utilization and BOX-PCR genomic fingerprints.

Key words: Bacterial leaf spot of poinsettia, BOX-PCR, Hypersensitive reaction, Pathogenicity, X. axonopodis pv. poinsettiicola
doi:10.1631/jzus.2005.B0451             CLC number: S432.4